Add blob storage to CI runners (#2260)

Add blob storage to CI runners and enable for transformers cache on inference tests

.github/workflows/nv-inference.yml

@@ -61,4 +61,4 @@ jobs:
           if [[ -d ./torch-extensions ]]; then rm -rf ./torch-extensions; fi
           cd tests
           EXPECTED_TORCH=$(pip index versions torch | grep -oP -m1 "^\s*LATEST.*\s\K\d+\.\d+")
-          TORCH_EXTENSIONS_DIR=./torch-extensions pytest --color=yes --durations=0 --forked --verbose -m 'inference' unit/ --torch_ver=$EXPECTED_TORCH --cuda_ver="11.3"
+          TRANSFORMERS_CACHE=/blob/transformers_cache/ TORCH_EXTENSIONS_DIR=./torch-extensions pytest --color=yes --durations=0 --forked -n 4 --verbose -m 'inference' unit/ --torch_ver=$EXPECTED_TORCH --cuda_ver="11.3"